"It's not as useful as either of its competitors' options, though, since a PC is a much more expensive accessory than a $200 Vita or the included GamePad," Stapleton continued. "And again, it's more about adding functionality to your Xbox One than to your PC," he said.

As to the longtime rivalry between PC gamers and console gamers, Stapleton said Microsoft does have to tread carefully.

"Cross-platform gaming is actually a really good idea for the most part. It increases player communities and makes it easier to find a full game," he said. "The only real issue is that in certain games PC players have a huge advantage when using a mouse controller, but a game like Fable Legends shouldn't have that problem at all."

Stapleton did point out that Microsoft's previous attempt at unifying Xbox and PCs, called Games for Windows Live, went down in flames. He hoped this won't be a repeat of that.

Spencer also announced upcoming support for the streaming of Xbox One games to any Windows 10 PC or tablet.

Windows 10's other gaming features will also include a game DVR mode similar to Nvidia's ShadowPlay, which will allow a player to hit Windows-G and record the last 30 seconds of game play.

The game DVR mode is a nod toward the increasingly social aspect of gaming. Microsoft said you'll be able to take those 30-second moments of epic gaming and be able to share them using the included Xbox App that will be bundled into Windows 10 devices. The app will let you chat, post achievements, and start Skype calls between gamers.